Braking System for a Stroller

ABSTRACT

A braking system for a stroller includes: a brake pedal positioned near a first rear wheel of the stroller; a braking cam operationally coupled to the brake pedal and rotatable around a pivot point from a first position to a second position; and a brake lever having a first end configured to contact the braking cam when the braking cam is in the second position, and a second end having a plurality of teeth configured to engage at least one gear driven by the first rear wheel of the stroller when the braking cam is in the second position. A depression of the brake pedal causes the braking cam to rotate around the pivot point from the first position to the second position, thereby causing the teeth of the brake lever to engage the at least one gear to prevent rotation of the first rear wheel.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is based on U.S. Provisional Patent Application No.61/094,574, filed Sep. 5, 2008, on which priority of this patentapplication is based and which is hereby incorporated by reference inits entirety. This application is also a continuation-in-part of U.S.patent application Ser. No. 12/032,370, filed Feb. 15, 2008, whichclaims the benefit of priority from U.S. Provisional Patent ApplicationNos. 60/890,597 filed Feb. 19, 2007; 60/890,601 filed Feb. 19, 2007;60/890,605 filed Feb. 19, 2007; 60/890,607 filed Feb. 19, 2007;60/890,608 filed Feb. 19, 2007; 60/890,613 filed Feb. 19, 2007;60/890,616 filed Feb. 19, 2007; 60/890,618 filed Feb. 19, 2007;60/890,619 filed Feb. 19, 2007; and 60/890,624, filed Feb. 20, 2007, allof which are incorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to strollers, and moreparticularly, pertains to baby strollers having one or more componentswhich can be moved by a drive mechanism.

2. Description of Related Art

Baby strollers, also referred to as baby carriages, baby buggies, orprams, have been used to hold and transport babies and young childrenfor many years. Early baby strollers had parts which were fixedlysecured to one another such that they did not fold for compactness. Morerecently, baby strollers have been designed to have some parts which aremovable relative to one another to allow movement of some parts of thestroller to achieve a more compact configuration when not in use.However, current strollers do not allow for movement or folding tocompact configuration as desired, and are cumbersome and sometimesdifficult to move between their collapsed (closed) positions and theiroperative (open) positions, particularly when attending to a baby orchild. A stroller which is easier to move between its collapsed andoperative positions, such as one that does so upon the push of a buttonvia motorized movement, is desired.

SUMMARY OF THE INVENTION

One embodiment of the present invention is directed to a braking systemfor a stroller. The braking system includes: a brake pedal positionednear a first rear wheel of the stroller; a braking cam operationallycoupled to the brake pedal and rotatable around a pivot point from afirst position to a second position; and a brake lever having a firstend configured to contact the braking cam when the braking cam is in thesecond position, and a second end having a plurality of teeth configuredto engage at least one gear driven by the first rear wheel of thestroller when the braking cam is in the second position. A depression ofthe brake pedal causes the braking cam to rotate around the pivot pointfrom the first position to the second position, thereby causing theteeth of the brake lever to engage the at least one gear to preventrotation of the first rear wheel.

A second depression of the brake pedal may cause the braking cam torotate around the pivot point from the second position to the firstposition, thereby causing the teeth of the brake lever to disengage theat least one gear to allow rotation of the first wheel. A second rearwheel may comprise a braking device that is operationally coupled to thebrake pedal positioned near the first rear wheel of the stroller. Thedepression of the brake pedal may cause actuation of the braking deviceof the second rear wheel, thereby preventing rotation of the second rearwheel. A second depression of the brake pedal may release the brakingdevice of the second rear wheel, thereby allowing rotation of the secondrear wheel. The braking device of the second rear wheel may beoperationally coupled to the brake pedal by a cable or other suitablecoupling device. The braking cam may have a modified elliptical shape.

Also provided is a method of braking a stroller. The method includes thestep of providing a braking system for a stroller. The braking systemincludes: a brake pedal positioned near a first rear wheel of thestroller; a braking cam operationally coupled to the brake pedal androtatable around a pivot point from a first position to a secondposition; and a brake lever having a first end configured to contact thebraking cam when the braking cam is in the second position, and a secondend having a plurality of teeth configured to engage at least one geardriven by the first rear wheel of the stroller when the braking cam isin the second position. The method also includes the step of depressingthe brake pedal to cause the braking cam to rotate around the pivotpoint from the first position to the second position, thereby causingthe teeth of the brake lever to engage the at least one gear to preventrotation of the first rear wheel.

The method may further include the step of depressing the brake pedal asecond time to cause the braking cam to rotate around the pivot pointfrom the second position to the first position, thereby causing theteeth of the brake lever to disengage the at least one gear to allowrotation of the first wheel. The braking system may further comprise abraking device provided on a second rear wheel and operationally coupledto the brake pedal positioned near the first rear wheel of the stroller.The depression of the brake pedal may cause actuation of the brakingdevice of the second rear wheel, thereby preventing rotation of thesecond rear wheel. A second depression of the brake pedal may releasethe braking device of the second rear wheel, thereby allowing rotationof the second rear wheel. The braking device of the second rear wheelmay be operationally coupled to the brake pedal by a cable or othersuitable coupling device. The braking cam may have a modified ellipticalshape.

Also provided is a braking system for a stroller that includes: a brakepedal; a braking cam operationally coupled to the brake pedal androtatable around a pivot point from a first position to a secondposition; and a brake lever having a first end configured to contact thebraking cam when the braking cam is in the second position, and a secondend configured to prevent rotation of at least one wheel of the strollerwhen the braking cam is in the second position.

A depression of the brake pedal may cause the braking cam to rotatearound the pivot point from the first position to the second position,thereby causing the second end of the brake lever to prevent rotation offirst rear wheel. A second depression of the brake pedal may cause thebraking cam to rotate around the pivot point from the second position tothe first position, thereby causing the second end of the brake lever toallow rotation of the first rear wheel. The braking cam may have amodified elliptical shape. The second end of the brake lever may includea plurality of teeth. The plurality of teeth may be configured to engageat least one gear driven by the at least one rear wheel of the strollerwhen the braking cam is in the second position.

These and other features and characteristics of the present invention,as well as the methods of operation and functions of the relatedelements of structures and the combination of parts and economies ofmanufacture, will become more apparent upon consideration of thefollowing description and the appended claims with reference to theaccompanying drawings, all of which form a part of this specification,wherein like reference numerals designate corresponding parts in thevarious figures. It is to be expressly understood, however, that thedrawings are for the purpose of illustration and description only andare not intended as a definition of the limits of the invention. As usedin the specification and the claims, the singular form of “a”, “an”, and“the” include plural referents unless the context clearly dictatesotherwise.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a collapsible stroller shown in its openposition in accordance with one embodiment of the present invention;

FIG. 2 is a top plan view of the stroller of FIG. 1 shown in its openposition;

FIG. 3 is a front view of the stroller of FIG. 1 shown in its openposition;

FIG. 4 is a front view of the stroller of FIG. 1 with a covering of ahub removed therefrom;

FIG. 5 is a left side view of the stroller of FIG. 1 shown in its openposition;

FIG. 6 is a right side view of the stroller of FIG. 1 shown in its openposition;

FIG. 7 is a side view of the stroller of FIG. 1 shown in its partiallyopen position;

FIG. 8 is a front view of the stroller of FIG. 1 shown in its partiallyopen position;

FIG. 9 is a side view of the stroller of FIG. 1 shown in its fullyclosed position;

FIG. 10 is a front perspective view of the stroller of FIG. 1 shown inits fully closed position;

FIG. 11 is a perspective view of a suspension module of the stroller ofFIG. 1;

FIG. 12 is a portion of FIG. 1 illustrating a seat frame mounting memberenlarged for magnification purposes;

FIG. 13 is a perspective view of a seating portion of the stroller ofFIG. 1 with a seat provided thereon;

FIG. 14 is a front schematic view illustrating a drive mechanism of thestroller of FIG. 1;

FIG. 15 is a top perspective view of a housing of the stroller of FIG. 1illustrating a coupling mechanism;

FIG. 16 is a side view of the housing of FIG. 15;

FIG. 17 is a top schematic view illustrating a motor and gear train ofthe drive mechanism of FIG. 14;

FIGS. 18A and 18B are side schematic views of a support structure of thestroller of FIG. 1 in an open position and a collapsed position,respectively;

FIG. 19 is a side schematic view of a lower arcuate support component ofthe support structure of the stroller of FIG. 1;

FIG. 20 is an enlarged view of the lower arcuate support component ofthe support structure of the stroller of FIG. 1 illustrating a latchingmechanism;

FIG. 21 is a side perspective view of the latching mechanism of FIG. 20;

FIG. 22 is an enlarged side perspective view illustrating the latchingmechanism of FIG. 20 engaged between the lower arcuate support componentand the upper arcuate support component of the support structure;

FIGS. 23A-23C are side schematic views of a braking mechanism of thestroller of FIG. 1 in the released, partially engaged, and engagedpositions, respectively;

FIGS. 24 and 25 are side schematic and exploded perspective views of agenerator system of the stroller of FIG. 1;

FIG. 26 is a block diagram illustrating a control system for thegenerator system of FIGS. 24 and 25;

FIG. 27 is a block diagram of a power management system for use with thestroller of FIG. 1; and

FIG. 28 is a top plan view of a handlebar assembly of the stroller ofFIG. 1.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

For purposes of the description hereinafter, the terms “upper”, “lower”,“right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “lateral”,“longitudinal”, and derivatives thereof shall relate to the invention asit is oriented in the drawing figures. However, it is to be understoodthat the invention may assume alternative variations and step sequences,except where expressly specified to the contrary. It is also to beunderstood that the specific devices and processes illustrated in theattached drawings, and described in the following specification, aresimply exemplary embodiments of the invention. Hence, specificdimensions and other physical characteristics related to the embodimentsdisclosed herein are not to be considered as limiting.

With reference to FIGS. 1-10, a stroller, denoted generally as referencenumeral 1, includes a hub 3; a support structure 5 having a first end 7coupled to hub 3 and a second end 9; a seating portion 11 having abottom portion 13 coupled to a top portion of hub 3 and a top portion 15coupled to second end 9 of support structure 5. Hub 3 includes a housing33 (see FIG. 4) that is covered by a covering 4. Stroller 1 isconfigured to collapse in the length, width, and height directions forstorage and transportation as shown in FIGS. 9-10 and expand in thelength, width, and height directions for use as shown in FIGS. 1-6. Anintermediate position between the collapsed position and the expandedposition is shown in FIGS. 7-8.

Stroller 1 further includes a first front leg 17 rotationally coupled tohub 3 and a second front leg 19 rotationally coupled to hub 3. A firstfront wheel 21 is rotationally coupled to and supported by first frontleg 17 and a second front wheel 23 is rotationally coupled to andsupported by second front leg 19. A proximal end 25, 27 of each frontleg 17, 19 includes a post 29, 31 that is rotatably engaged withinhousing 33 of hub 3. Posts 29, 31 are mechanically coupled as will bediscussed in greater detail hereinafter, thereby enabling rotationalmovement of each front leg 17, 19 about housing 33 between an openposition (see FIGS. 1-6) and a collapsed position (see FIGS. 9-10).

With reference to FIG. 11 and with continued reference to FIGS. 1-10,pivotally connected to a distal end 35, 37 of each front leg 17, 19 is apair of generally U-shaped wheel receiving members 39, 41 for receivingrespective front wheels 21, 23. Each wheel receiving member 39, 41comprises an axle 43 to allow the front wheels 21, 23 to roll abouttheir respective axles 43. Wheel receiving members 39, 41 are pivotallyconnected via a post 45 or any other suitable fastening mechanism to thedistal ends 35, 37 of front legs 17, 19 to allow the front wheels 21, 23to pivot about respective axes substantially perpendicular to theiraxles 43 to accommodate changes in the rolling direction of the front ofstroller 1.

A suspension module 47 may be disposed between each wheel receivingmember 39, 41 and distal end 35, 37 of each front leg 17, 19. While anyof a number of suspension mechanisms well-known to those skilled in theart may be used, such as compression springs or the like, the preferredsuspension module 47 also ensures the wheel receiving members 39, 41avoid being trapped or stuck when stroller 1 is automatically folded asdescribed in greater detail hereinafter. To accomplish this, suspensionmodule 47 is rotatably attached to an upper, front portion 49 of wheelreceiving member 39, 41 by a pin 51. A torsion spring 53 is provided tobias suspension module 47 against wheel receiving member 39, 41 duringnormal operation. Pin 51 is placed in upper, front portion 49 of wheelreceiving member 39, 41 so that normal use of the stroller will notcause suspension module 47 to pull away from wheel receiving member 39,41. However, during automatic or manual folding of stroller 1, it ispossible that front wheels 21, 23 could be oriented in an undesirableposition whereby one or both of the front wheels 21, 23 are wedgedagainst another part of stroller 1, blocking front legs 17, 19 fromfolding properly. To alleviate this possibility, suspension module 47accommodates rotation about pin 51 of up to approximately 80 degrees inorder to provide sufficient clearance for front legs 17, 19 to foldproperly.

With continued reference to FIGS. 1-10, stroller 1 further includes afirst rear leg 55 and a second rear leg 57. First rear leg 55 and secondrear leg 57 are rotationally coupled to hub 3. In addition, first rearleg 55 and second rear leg 57 are mechanically coupled to each other andto first front leg 17 and second front leg 19 as will be described ingreater detail hereinafter. Each rear leg 55, 57 has a longcross-sectional dimension and a short cross-sectional dimension. Inaddition, each rear leg 55, 57 is configured to rotationally support arear wheel 59, 61 at a distal end 63, 65 thereof within a respectiverear wheel housing 67, 69. More specifically, the respective axles 71,73 of rear wheels 59, 61 are received in the respective rear wheelhousings 67, 69 to allow the rear wheels 59, 61 to roll about theirrespective axles 71, 73. Each rear wheel housing 67, 69 houses a brakingmechanism, operated by either or both of brake pedals 75, 77 forselectively locking rear wheels 59, 61 to prevent inadvertent rollingmovement of stroller 1 when the braking mechanism is locked. The brakingmechanism will be discussed in greater detail hereinafter with referenceto FIGS. 23A-23C. In addition, each rear wheel housing 67, 69 alsohouses a power generating device operationally coupled to the respectiveaxle 71, 73 of rear wheels 59, 61. The power generating device isprovided to recharge an onboard power supply, which provides power to anactuation device that allows the stroller to collapse and expandautomatically. The power supply also provides power to additionalaccessories and onboard systems. The power generating device will bediscussed in greater detail hereinafter with reference to FIGS. 24-27.

A proximal end 79, 81 of each rear leg 55, 57 is rotationally coupled tohub 3 for enabling rotational movement of the rear legs 55, 57 such thatthe rear legs 55, 57 are movable between an open position (see FIGS.1-6) and a collapsed position (see FIGS. 9-10). Rear legs 55, 57, incross-section, have a long dimension and a short dimension. A planebisecting the long dimension of a portion of rear legs 55, 57 neardistal ends 63, 65 thereof is canted in the range of 12 to 25 degrees,preferably 19 degrees, in relation to a plane bisecting the longdimension of a portion of rear legs 55, 57 near proximal ends 79, 81.This cant results in a narrower footprint when rear legs 55, 57 are intheir collapsed position than when they are in their open position. Byway of further illustration, as rear legs 55, 57 are collapsed, the rearwheels 59, 61 move closer to each other to provide a more compact foldedstroller 1 as illustrated in FIGS. 7-10.

Referring now to seating portion 11 of stroller 1 of the presentinvention, seating portion 11 includes a generally U-shaped lower seatframe assembly 83 and a generally U-shaped upper seat frame assembly 85.Lower seat frame assembly 83 and upper seat frame assembly 85 arecoupled together giving seating portion 11 a generally elliptical-shapedappearance as shown in FIG. 1. Lower seat frame assembly 83 includes twolower arcuate seat frame components 87, each having the same radius,pivotally connected at a first end 89 to a seat frame mounting member 91to allow each of lower arcuate seat frame components 87 to pivot orrotate relative to seat frame mounting member 91. With specificreference to FIG. 12, seat frame mounting member 91 is detachably androtatably disposed on a mounting bracket 93 that is fixably attached tohousing 33 of hub 3. Mounting bracket 93 has a mediate portion 95rotatably attached at a front end 97 of mounting bracket 93 by a pin 99.In one embodiment, mediate portion 95 is spring biased such that, whenin use, the weight of an infant or child will cause seat frame mountingmember 91 to push down on mediate portion 95 and, in turn, cause abottom surface of mediate portion 95 to trigger a weight sensor (notshown). The weight sensor or other sensor designed to detect thepresence of an infant or child in stroller 1 is operatively connected toa control system to disable accidental actuation of the drive systemthat causes stroller 1 to collapse as will be more fully describedhereinafter.

Referring to FIGS. 1-10, upper seat frame assembly 85 is comprised oftwo upper arcuate seat frame components 101, each having the same arcradius. The arc radius of each of upper arcuate seat frame components101 may be the same as the arc radius of lower arcuate seat framecomponents 87. This arc radius may be approximately 43 inches; however,this is not to be construed as limiting as the upper and lower arcuateseat frame components may have other arc radii. Upper arcuate seat framecomponents 101 are pivotably connected at their first ends 103 to anupper seat frame mounting member 105 to allow each of the upper arcuateseat frame components 101 to pivot or rotate relative to the upper seatframe mounting member 105.

Each upper arcuate seat frame component 101 is slidingly mated, at asecond end 107, to a second end 109 of its corresponding lower arcuateseat frame component 87, such that upon collapsing stroller 1, eachlower arcuate seat frame component 87 will be slidingly received intoits corresponding upper arcuate seat frame component 101. In analternative embodiment, each upper arcuate seat frame component 101 maybe slidingly received within its corresponding lower arcuate seat framecomponent 87. As best seen by FIGS. 3 and 10, this arrangement of lowerarcuate seat frame components 87 and upper arcuate seat frame components101 allows the overall width of the generally U-shaped upper and lowerarcuate seat frame assemblies 83, 85 to decrease (consistent with thedecrease in the lateral width of the wheels) as they move from theiropen position as shown in FIG. 3 to their collapsed position shown inFIG. 10.

Accordingly, it will be appreciated that stroller 1 provides a seatingportion 11, a support structure 5, a pair of front legs 17, 19, and apair of rear legs 55, 57 that define a linkage having a single degree offreedom, such that movement of any one of the seating portion 11, thesupport structure 5, the pair of front legs 17, 19, and the pair of rearlegs 55, 57 relative to one another toward their collapsed or openpositions may cause movement of the others toward their collapsed oropen positions.

With reference to FIG. 13 and with continued reference to FIGS. 1-10,another aspect of stroller 1 of the present invention is that seatingportion 11 can be detached at lower seat frame mounting member 91 andupper seat frame mounting member 105 and replaced by either another seator a different component. For instance, seating portion 11 can beremoved and replaced by a seating portion that can seat two children. Inaddition, a car seat or bassinet adapter can be provided allowing a userto attach a car seat or a bassinet to stroller 1. In FIG. 7, seatingportion 11 is illustrated as being detached from stroller 1. Seatingportion 11 includes a seat 111 removably disposed upon seating portion11. Seat 111 is desirably manufactured from a soft cloth-like materialsuch that seat 111 collapses when stroller 1 is collapsed and expandswhen stroller 1 is opened. Seat 111 includes an upper seat portion 113and a lower seat portion 115. Upper seat portion 113 securely sleevesaround upper arcuate seat frame component 101 using snaps, zippers, orany other suitable fastening device for removably but securely fasteningupper seat portion 113 to upper arcuate seat frame component 101 so thatit is removable for cleaning or changing color, but is safely attachedwhen in use. Upper seat portion 113 extends along and wraps around upperarcuate seat frame component 101 from a lower end collar 117 on one sideto a lower end collar 119 on the other side. Upper seat portion 113includes a seatback 121, infant securing straps 123, sunshade 125secured to sunshade securing members 127, a seat bottom 129, and a pairof cupholders 131 integral to upper seat portion 113. As an example,cupholders 131 may be comprised of strips of padded fabric that arevertically stitched into the cupholder 131 to assist in maintaining itsform. While not shown, an annulus can also be stitched into the top ofcupholder 131 for better shape maintenance. Upper seat portion 113 mayfurther include reflective piping 133 to enable a user of stroller 1 tobe seen during conditions of low or reduced visibility.

With continued reference to FIG. 13, lower seat portion 115 extends fromseat bottom 129 and is loosely sleeved around each lower arcuate seatframe component 87 with mesh or similar material in accordance withanother aspect of the invention. Due to the fact that lower arcuate seatframe components 87 telescope into upper arcuate seat frame components101 when stroller 1 is placed into the collapsed position, it isdesirable for upper seat portion 113 to be connected to upper arcuateseat frame components 101 only because it does not need to collapse orfold vertically when the stroller is folded or collapsed. The lower seatportion 115, on the other hand, must accommodate the telescoping of thelower arcuate seat frame components 87 and the concomitant loss ofspace. Thus, at least an edge area 135 of lower seat portion 115, whereit is attached to the lower arcuate seat frame components 87, must beconstructed with material that does not inhibit or bind the telescopingaction. In a preferred embodiment, this material is a fabric mesh.

In another aspect, stroller 1 may be provided with a cupholder traydevice (not shown) having a base portion and a tray portion. The baseportion is cylindrical and securely fits into either or both ofcupholders 131 for a secure connection to upper seat portion 113.Disposed on the base portion, the tray portion extends flatly and inparallel with the ground to provide a multipurpose surface for thestroller occupant while still ensuring that there are no entrapmenthazards, typically associated with fixed trays in the past. Thiscupholder tray device may be easily removed for cleaning or storagewhile the cupholders 131 are otherwise in use.

With continued reference to FIGS. 1-10, at least one luggage wheel 137can be provided at a lower front portion of hub 3 of stroller 1 tofacilitate transport of stroller 1 when it is in a collapsed position.

With specific reference to FIGS. 5, 7, and 9, support structure 5desirably has an arcuate shape and includes a lower arcuate supportcomponent 139 and an upper arcuate support component 141. As with upperand lower arcuate seat frame components 87 and 101, upper arcuatesupport component 141 is slidingly mated with lower arcuate supportcomponent 139 such that upon collapsing stroller 1, lower arcuatesupport component 139 slidingly sleeves on two sets of raised skis (notshown) into upper arcuate support component 141. An upper arcuatesupport component end portion 143 may have raised skis on an interiorsurface thereof that make contact with lower arcuate support component139. End portion 143 of upper arcuate support component 141 isconfigured to be slidingly sleeved over an end portion 144 of lowerarcuate support component 139 such that upon collapsing stroller 1,upper arcuate support component 141 will slidingly sleeve down overlower arcuate support component 139. As with the seat frame components87 and 101, arcuate support components 139 and 141 are able to telescopeor sleeve over or under each other because they have the same arcradius, but slightly different bore radii. A first end 7 of supportstructure 5 is fixably attached to the housing 33 disposed within hub 3.

Stroller 1 may be provided with a removeable storage bag (not shown).The storage bag is configured to be hanged from hooks or other fasteningdevices protruding from upper arcuate support component 141 at a pointinside a line drawn between the center of each of rear wheels 59, 61. Asa result of the hooks being placed in front of rear wheels 59, 61, alarge amount of weight, whether from shopping bags or a fully loadedstorage bag, will not cause an unsafe tipping condition as is seen inmany current strollers.

In addition to the advantage of being able to collapse stroller 1through the use of multiple arcuate components that can slide into eachother, arcuate support assembly 5 has the additional advantage ofsupporting seating portion 11 and a handlebar assembly 145 with a singletube while providing significant clearance in the seat area of seatingportion 11 to enable placement of a carry cot (not shown) or provide fora recline of the seat 111 without hitting arcuate support assembly 5.

With specific reference to FIG. 2, second end 9 of support structure 5is attached to a handlebar assembly 145. Handlebar assembly 145 includesa central component 147, a first handle 149 coupled to central component147, and a second handle 151 coupled to central component 147. Firsthandle 149 and second handle 151 allow a user to maneuver stroller 1. Inaddition, first handle 149 and second handle 151 are configured to movefrom a first, retracted position, as shown in FIG. 2, to a collapsedposition by pushing buttons 153 and rotating each handle 149, 151 aroundcentral component 147. Central component 147 of handlebar assembly 145is coupled to second end 9 of support structure 5 by a telescopingmember 155. Telescoping member 155 extends vertically from second end 9of support structure 5, thereby allowing a user to adjust handlebarassembly 145 for height in the directions of arrow B, shown in FIG. 5.

Handlebar assembly 145 may further include a controller interface 157having a display portion 158 for actuating the powered aspects ofstroller 1 of the present invention and for providing various otherinformation as will be discussed in greater detail hereinafter. Astorage compartment 159 may also be positioned at second end 9 ofsupport structure 5.

With reference to FIGS. 14-18, housing 33 of hub 3 has a generallytrapezoidal shape having a top surface 161 and two side surfaces 163extending from top surface 161 at an angle. Housing 33 is preferablycomprised of steel or another suitable material and provides a sturdyfoundation for stroller 1. For explanatory purposes, some of elements ofFIGS. 14-18 have been omitted so that other items may be viewed.

With specific reference to FIGS. 15 and 16, front legs 17 and 19 andrear legs 55 and 57 are mechanically coupled and configured to be drivenby a single motor 167 as follows. A left coupling system 171 for theleft rear leg 57 and left front leg 19 includes a rear leg mounting bar173 to which rear leg 57 is fixedly coupled; a gear 175 mounted on sidesurface 163 of housing 33; a bushing 177 coupled to gear 175 andextending through a slot 179 provided at an end of mounting bar 173; aJ-shaped spool component 181 fixedly coupled to mounting bar 173 betweenslot 179 and rear leg 57; and a cable 183 configured to wrap aroundJ-shaped spool component 181 and post 31 of front leg 19. An identicalright coupling system is mounted on the other side surface 163 formechanically coupling right rear leg 55 and right front leg 17.

Housing 33 further includes a drive mechanism 165 mounted thereon whichpowers stroller 1 to be moved back and forth between its open andcollapsed positions. More specifically, drive mechanism 165 isconfigured to mechanically link and simultaneously drive gears 175 ofright and left coupling systems 171, thereby causing legs 17, 19, 55, 57to synchronously expand or collapse. Drive mechanism 165 is furtherconfigured to cause the support structure 5 to expand or collapse aswill be discussed in greater detail hereinafter.

In one embodiment of the present invention, drive mechanism 165 includesa motor 167 mounted in a fixed position on an inner casing 169 ofhousing 33, and a gear train 170 positioned within inner casing 169 andhaving a first gear driven by a drive shaft of motor 167 (see FIG. 17).Gear train 170 is configured to allow a single motor (i.e., motor 167)to drive rotational drive spool gear 185 and first and second drivegears 187, 189 as will be discussed hereinafter. Motor 167 may be of areversible type, or alternatively, a single-direction motor withmechanical reversing means.

With continued reference to FIG. 17, gear train 170 is configured toallow motor 167 to drive first and second drive gears 187, 189 throughfirst and second universal joints 191, 193. First and second universaljoints 191, 193 are configured to operationally couple first and seconddrive gears 187, 189 and gear train 170 and allow first and second drivegears 187, 189 to extend through and be positioned adjacent to angledside surfaces 163 of housing 33 as shown in FIG. 15. Accordingly, motor167, through gear train 170 and first and second universal joints 191,193, is capable of simultaneously driving first and second drive gears187, 189. In addition, first rear leg 55 and second rear leg 57 aremechanically coupled between gear train 170 and first and seconduniversal joints 191, 193. First and second drive gears 187, 189 arepositioned to rotationally drive gears 175 of right and left couplingsystems 171.

With specific reference to FIGS. 18A-18B and with continued reference toFIGS. 14-17, the operation of drive mechanism 165 and coupling assembly171 will be described in greater detail. Initially, stroller 1 is in anexpanded position as shown in FIG. 18A. In this position, bushing 177 isaligned within slot 179 with an axle of gear 175 along axis Y₁. Axis Y₁is perpendicular to an axis X₁ along which rear leg 57 extends. Thisconfiguration locks rear legs 55, 57 in the open position even if a userprovides a downward force on legs 55, 57. When a signal is provided todrive mechanism 165 to cause stroller 1 to collapse, motor 167 drivesgear train 170 which in turn drives universal joints 191, 193, causingdrive gears 187, 189 to rotate. This rotation drives gears 175, causingbushings 177 to travel within slots 179 in rear leg mounting bar 173.This causes rear leg mounting bar 173, and thereby rear legs 55 and 57,to rotate in the direction of arrow A₁ to the collapsed position. Inaddition, since posts 29, 31 for supporting front legs 17, 19 are eachmechanically coupled to respective rear legs 55, 57 by cable 183connected to spool component 181, as rear legs 55, 57 rotate in thedirection of arrow A₁, front legs 17, 19 also rotate in the direction ofarrow A₂ to the collapsed position. In the collapsed position, bushing177 is aligned within slot 179 with an axle of gear 175 along axis Y₂.Axis Y₂ is perpendicular to an axis X₂ along which rear leg 57 extends.This configuration locks rear legs 55, 57 in the collapsed position evenif a user provides an upward force on rear legs 55, 57.

Once in the collapsed position as shown in FIG. 18B, drive mechanism 165can be controlled to cause stroller 1 to return to the open position ofFIG. 18A. When a signal is provided to drive mechanism 165 to causestroller 1 to open, motor 167 drives gear train 170, which in turndrives universal joints 191, 193, causing drive gears 187, 189 torotate. This rotation drives gears 175, causing bushings 177 to travelwithin slots 179 in rear leg mounting bar 173. This causes rear legmounting bar 173, and thereby rear legs 55 and 57, to rotate in thedirection of arrow A₃ to the open position. In addition, since posts 29,31 for supporting front legs 17, 19 are each mechanically coupled torespective rear legs 55, 57 by cable 183 connected to spool component181, as rear legs 55, 57 rotate in the direction of arrow A₃, front legs17, 19 also rotate in the direction of arrow A₄ to the open position.This rotation of front legs 17, 19 may be aided by the placement of aspring 195 around posts 29, 31 that support front legs 17, 19. The useof such springs 195 allows a smaller, less powerful motor to be used indrive mechanism 165.

With reference to FIGS. 19-21, and with continued reference to FIGS.14-18B, seat portion 11 and support structure 5 are also movable betweena collapsed position and an open position. In order to accomplish this,drive mechanism 165 further includes a spool gear 185 provided in geartrain 170 and configured to be driven by motor 167. Spool gear 185 isfixedly attached to and configured to drive a spool shaft 197. Spoolshaft 197 further includes a spool pair 199 having a first side 199 aand a second side 199 b fixedly attached thereto. A first cable (notshown) is run from a first side 199 a of spool pair 199 up to and arounda first key pulley 201 mounted inside end portion 144 of lower arcuatesupport component 139. The cable runs around first key pulley 201 andthrough a first pulley 203 of a latching mechanism 205. A second cable(not shown) is run from a second side 199 b of spool pair 199 up to andaround a second key pulley 207 mounted inside end portion 144 of lowerarcuate support component 139. The cable runs around second key pulley207 and through a second pulley 209 of latching mechanism 205. Latchingmechanism 205 includes a pair of latch members 211 configured to extendthrough a recess 213 in upper arcuate support component 141. Since upperarcuate support component 141 is designed to slide over lower arcuatesupport component 139 as previously described, activation of spool pair199 in either direction moves support structure 5 between an open and acollapsed position. Moreover, due to the fact that the seating portion11 can also telescope as previously described, activation of the spoolpair 199 also moves seating portion 11 between an open and a collapsedposition.

When in a fully-open position, support structure 5 comprises latchingmechanism 205 that ensures the stroller 1 remains open when in the openposition. In one embodiment, latching mechanism 205 includes a pair oflatch members 211 biased to extend outwardly from support structure 5.Latch members 211 are movable to a retracted position not extendingoutwardly from support structure 5. Recesses 213 for receiving latchmembers 211 when it is in its extended position are provided in upperarcuate support component 141 to receive and engage latch members 211therein, and thereby engage lower arcuate support component 139 as shownin FIG. 22. Due to the single degree of freedom of the stroller linkage,this prevents the stroller from being moved toward its collapsed orfolded position. The latch members 211 can be released from recesses 213by moving the latch to its retracted position to disengage the latchmembers 211 and thereby disengage upper arcuate support component 141 toallow telescoping or sleeving movement of upper arcuate supportcomponent 141 over lower arcuate support component 139 and accordinglyallow movement of the stroller toward its collapsed position.

After latch members 211 have been disengaged and the stroller has beenmoved to its collapsed position, and upon movement of the strollertoward its open position, latch members 211 are biased against theinterior surface of upper arcuate support component 141 until thestroller is fully open, at which point latch members 211 are alignedwith, and extend into, recesses 213 to prevent movement of the strollertoward its collapsed position until the latch members 211 are retracted.

Accordingly, as motor 167 is actuated, it causes gear train 170 torotationally drive spool gear 185 and, correspondingly, the spool pair199 whereby the cable (not shown) is simultaneously wound and unwound onthe spool pair 199 and upper arcuate support component 141 is drivenlongitudinally along lower arcuate support component 139 between acollapsed and an open position. Correspondingly, the seating portion 11is also moved between a collapsed and an open position. Hence, drivemechanism 165 is operatively engaged with support structure 5 andseating portion 11 to move them between their collapsed and openpositions.

While stroller 1 was described hereinabove as including drive mechanism165, this is not to be construed as limiting as other drive mechanismsmay be utilized. For instance, U.S. Provisional Patent Application No.61/094,574, entitled “Stroller”, discloses an alternative drivemechanism. This application claims priority to U.S. Provisional PatentApplication No. 61/094,574 and it is hereby incorporated by reference.

Additionally, as described hereinabove, drive mechanism 165 includes anelectric motor 167 capable of moving the elements of stroller 1.However, this is not to be construed as limiting the present invention,as the drive mechanism may utilize a variety of other elements. Forinstance, but not by way of limitation, the drive mechanism may be ahydraulic or pneumatic drive, with hydraulic or pneumatic tubesextending from a hydraulic or pneumatic pump, internally and/orexternally of one or more stroller components, to desired locations ofthe stroller to effect movement of one or more stroller components.Cables, running internally and/or externally of one or more strollercomponents, may be utilized. Suitable accommodation for the cables,pneumatic tubing, hydraulic tubing, and/or electrical wires ispreferably provided to prevent pinching, folding, or other deformation,which would prevent suitable or optimal operation of these elements. Anenergy storing drive or drive mechanism (such as one utilizing a springloaded element, other resilient element, or electromagnetic storageelement), which stores energy when one or more stroller components aremoved from one position to another for subsequent release of part or allof the stored energy to effect movement of the same or other strollercomponents, may be utilized. Rotary drives and/or drive mechanisms, ornon-rotary drives and/or drive mechanisms may be utilized. One type ofdrive or drive mechanism may be utilized, or any combination of two ormore drive mechanisms may be utilized either in combination with oneanother or individually.

Furthermore, the drive mechanism may be located at, or in proximitywith, a location (or locations) on stroller 1 at which one or morestroller components are desired to be moved, or the drive mechanism(s)may be located remote from such location or locations, with suitableoperative engagement extending between a remotely located drivemechanism and the location or locations on the stroller at which one ormore stroller components are desired to be moved. Such operativeengagement may include, for instance, cables, hydraulic tubes, pneumatictubes, electromagnetic forces, electric wires, or any of a wide varietyof other engagements.

Additionally, stroller 1 may be provided with additional latch orlocking components operatively connected with drive mechanism 165, or aseparate drive mechanism, which latches are moveable between a lockingposition which maintains the stroller in its collapsed position, and anunlocked position which allows the stroller to move from its collapsedposition to its open position.

With reference to FIGS. 23A-23C, a braking system 215 for stroller 1 isprovided in first rear wheel housing 67 and second rear wheel housing 69and operatively controlled by brake pedals 75, 77. The breaking systems215 provided in each rear wheel housing 67, 69 are identical andaccordingly only one braking system will be described hereinafter.

Braking system 215 includes a brake pedal 75 positioned such that itextends from rear wheel housing 69 and a braking cam 217 operationallycoupled to brake pedal 75 and rotatable around a pivot point 219 from afirst position (see FIG. 23A) to a second position (see FIG. 23C). Morespecifically, brake pedal 75 includes a peg 221 that is positionedwithin a slot 223 in the braking cam 217. As brake pedal 75 isdepressed, peg 221 travels from a first end of slot 223 to a second endof slot 223, thereby causing braking cam 217 to rotate about pivot point219. Braking cam 217 has a modified elliptical shape as shown in FIGS.23A-23C. Braking system 215 further includes a brake lever 225 having afirst end 227 configured to contact braking cam 217 when braking cam 217is in the second position, and a second end 229 having a plurality ofteeth 231 configured to engage the teeth 232 of a gear 233 driven byfirst rear wheel 59 of stroller 1 when braking cam 217 is in the secondposition, thereby preventing rotation of first rear wheel 59 andmovement of stroller 1.

A first depression of brake pedal 75 causes braking cam 217 to rotatearound pivot point 219 from the first position to the second position,thereby causing the teeth 231 of brake lever 225 to engage gear 233 toprevent rotation of first rear wheel 59. A second depression of brakepedal 75 causes braking cam 217 to rotate around the pivot point fromthe second position to the first position, thereby causing the teeth ofthe brake lever to disengage the at least one gear to allow rotation ofthe first wheel.

In addition, second rear wheel 61 includes a braking device positionedwithin second rear wheel housing 69 that is identical to braking system215 and operationally coupled to brake pedal 75 via a cable (not shown)or any other suitable coupling device such that the depression of brakepedal 75 causes the actuation of the braking system provided in secondrear wheel housing 69, thereby preventing rotation of second rear wheel61. A second depression of brake pedal 75 releases the braking deviceprovided in second rear wheel housing 69, thereby allowing rotation ofsecond rear wheel 61.

With reference to FIGS. 24-27, stroller 1 is desirably configured torecharge or maintain a predetermined power level of its onboard powersource through a dual generator system which is driven by the turning ofthe stroller wheels. The dual generator system includes identicalgenerator systems 235 positioned in each of the rear wheel housings 67,69. Since these generator systems are identical, only one of thesegenerator systems 235 will be described hereinafter.

Generator system 235 includes a gear reduction system 237 operationallycoupled between axle 73 of second rear wheel 61 and a generator 239.Gear reduction system 237 includes a plurality of gears, such as gear233 which is driven by axle 73 as second rear wheel 61 rolls, secondgear 241 driven by gear 233, third gear 243 driven by second gear 241,and fourth gear 245 driven by third gear 243. Fourth gear 245 is coupledto a drive shaft of generator 239 such that rotation of fourth gear 245causes generator 239 to produce electricity. A rubber bushing 247 may beprovided to surround all or part of generator 239 for noise reduction.Generator 239 may be embodied as an electric motor. Gear reductionsystem 237 is required because coupling a rear wheel 59, 61 directly tothe motor used as generator 239 to recharge a battery is impracticalsince it would require a large velocity on the wheel in order to achievethe roughly 3,000 revolutions per minute or 50 revolutions per secondfor which such motors are typically optimized. In order to accomplishthe desired recharging with the wheel and a motor, gear reduction system237 is required.

An issue with a generator mounted on the wheel of a stroller is that ifa gear-motor system as described hereinabove is directly connected tothe stroller wheel with no electronic controls system, the amount offorce felt by the user is not controllable and can at times be toolarge, thereby making it difficult for the user to push the stroller. Inparticular, higher rates of travel by the stroller will require greaterforces. If the user were to jog with the stroller, the force would belarge enough to be cumbersome. Accordingly, and with reference to FIG.26, a control system for the dual generator system is required. Controlsystem 249 includes a transistor 251, such as a MOSFET, provided betweengenerator 239 and a power storage device 253. A microcontroller 255, oranother suitable processing device, is provided to control the state oftransistor 251. In other words, transistor 251 is turned on or off bymicrocontroller 255 such that transistor 251 either allows current toflow into and charge power storage device 253 or it blocks it from doingso. If no current is allowed to flow, generator 239 is not generatingpower and it is easy to turn (or push the stroller) regardless of thespeed. Accordingly, microcontroller 255 pulses transistor 251 with aduty cycle with a certain proportion of “on” time. The greater thatproportion, the more current is allowed to flow from generator 239 topower storage device 253. This “on” time is lowered in proportion as theuser pushes the stroller faster to prevent them from feeling that thereis too much resistance. In addition, microcontroller 255 is programmedto charge a smaller percentage of each duty cycle, and thus makestroller 1 easier to push, when the stroller is first moved from astandstill into motion. It is also within the scope of the presentinvention to program microcontroller 255 to modify the duty cycle tomaximize recharging activity when the stroller is being pushed downhill,which can be monitored through the use of a MEMS gyroscope, a mercuryswitch, or other such device. This aspect has the added benefit ofslowing the stroller on downgrades for safety. This is calledregenerative braking.

An issue with charging a power storage device 253 from generator system235 is that power storage devices can be overcharged and fail. Toovercome this problem, transistor 251, with microcontroller 255 forcontrolling how much current is fed to power storage device 253, doublesas the tool through which the charging rate is controlled. For instance,if power storage device 253 is fully charged, microcontroller 255 willcontrol transistor 251 to open to prevent additional current fromflowing to power storage device 253. Power storage device 253 of thepresent invention is desirably a nickel metal hydride rechargeablebattery and is positioned within housing 33.

With reference to FIG. 27, microcontroller 255 also controls thedistribution of power generated by generator 239 and stored in powerstorage device 253 to a plurality of subsystems, such as drive mechanism165, a lighting system 257, and any of a plurality of accessories 259,such as speakers, a cell phone charging device, and a portable musicplayer.

Stroller 1 includes lighting system 257 to enhance safety. Lightingsystem 257 includes two lighting subsystems that provide: a) constantlighting for safety purposes such that the stroller can always be seen;and b) pathway lighting so that irregularities in the path of travel ofstroller 1 can be seen. The constant lighting subsystem includes adaytime running light 303 positioned on first front leg 17 and a daytimerunning light 303 positioned on second front leg 19. The daytime runninglights 303 are positioned on front legs 17, 19 such that the lightproduced thereby is visible from 360 degrees around stroller 1.

The pathway lighting subsystem includes a pair of path lights 305located underneath hub 3 and positioned to point forward. Accordingly,the path lights 305 cast light and illuminate surface irregularity in apath in front of stroller 1. Desirably, path lights 305 are located onhub 3 at a position that is within about 10 inches of pathway.

Lighting system 257 is powered by power storage device 253 which ischarged by generator 239. Microcontroller 255 is operatively coupled tothe constant lighting subsystem and pathway lighting subsystem and isconfigured to control the status of these subsystems. For instance,microcontroller 255 is configured to turn daytime running lights 303 onwhen the stroller is placed in the open position and off when thestroller is in the collapsed position. In addition, microcontroller 255is configured to turn on path lights 305 in low light conditions so thatthe user can clearly see any irregularities in the pathway. Themicrocontroller 255 turns path lights 305 on based on either manualfeedback from a user or automatic feedback from an ambient lightdetecting sensor (not shown) provided on stroller 1. Controllerinterface 157 may include an on/off switch for path lights 305 that auser can actuate. In addition, display 158 provided on controllerinterface 157 may provide a message to the user regarding the status ofboth daytime running lights 303 and path lights 305. Path lights 305 anddaytime running lights 303 may be embodied as light emitting diodes(LEDs).

While stroller 1 has been described hereinabove as including a powergenerating system for generating power to be stored in a battery, thepower source for driving motor 167 may be a replaceable and/orrechargeable battery or batteries, conventional battery or batteries,and/or a direct electrical supply such as that available from anelectrical outlet. In addition, the power source may be permanentlyattached to the stroller, or may be removable for charging, replacement,or the like. To keep stroller 1 relatively low in weight and/or to keepproduction costs down, or for other reasons, a relatively small powersource may be utilized which has sufficient power to move the strollerback and forth between its open and collapsed positions, but which doesnot have sufficient additional power to regularly or routinely poweradditional accessories or onboard systems without draining its powerundesirably quickly. Alternatively, a larger power source may beutilized which not only has sufficient power to move the stroller backand forth between its open and collapsed conditions, but also hasadditional capacity to drive one or more additional accessories and/oronboard systems, which accessories and/or onboard systems may beintegral with the stroller or may be modular additions or connections tothe stroller.

With reference to FIG. 28, a control switch 261 is provided, preferablyin the controller interface 157, which may be an integral portion ofhandlebar assembly 145 or detachable therefrom, for causing actuation ofdrive mechanism 165. Control switch 261 is operatively connected tomotor 167 through microcontroller 255 to control actuation of motor 167,which in turn controls drive mechanism 165, which in turn controlsmovement of the front legs 17, 19, rear legs 55, 57, and supportstructure 5 between their collapsed and open positions as discussed indetail hereinabove. Desirably, the wires extending between the controlswitch 261, microcontroller 255, and motor 167 are all disposedinternally of the stroller elements, such as extending internally withinhollow tubular members. The control switch 261, or a separate controlswitch and/or a common controller, may also be operatively coupled toone or more latch mechanisms to move the latch mechanisms from theirlatched positions in which they prevent the stroller from moving fromits fully-open position toward its collapsed position, to theirunlatched positions in which they allow the stroller to move from itsfully-open position towards its collapsed position. Motor 167, or aseparate drive mechanism, may be operatively connected to a controlswitch and/or controller to affect automatic movement of the latchesupon actuation by control switch 261. The unlatching of the one or morelatches is preferably carried out prior to, or simultaneous with, theinitiation actuation of motor 167.

Alternatively, a control switch may be provided at, or in proximitywith, one or more latches on the stroller (or operatively engaged withone or more latches), such that upon, or subsequent to, manuallyunlatching the one or more latches, the actuator is actuated to effectautomatic movement of the desired one or more stroller components from afirst position to a second position. That is, a control switch such as aposition sensing switch (which may be an optical switch, electricalcontact switch, or any other type of switch) may be provided which isoperatively engaged with a controller which controls the actuation ofthe drive mechanism as desired (which may be in any of a wide variety ofrates, sequences, options, etc.) The control switch or switches may belocated and configured to be triggered or actuated during conventionalmanual unlatching of the latch or latches, or may be at a convenientlocation on the stroller which allows the control switch to be easilyactuated while, or immediately subsequent to, unlatching of the latch orlatches. It may be desirable to provide an arrangement in which two ormore control switches associated with respective latches are required toboth be actuated to effect automatic movement of the desired one or morestroller components from a first position to a second position.

In order to be consistent with stroller safety standards, it ispreferred to have two separate and distinct actions taken to initiatefolding of the stroller and, thus, two control switches may be employedto comply with such safety specifications. Accordingly, controllerinterface 157 used to control motor 167 to control the collapsing andopening movements, or other desired stroller component movements, ofstroller 1 may be constructed and configured to have two or morediscrete switches (such as control switch 261 and control switch 263)which need to be actuated simultaneously, or in a predetermined sequenceor pattern, to effect actuation of motor 167 and thereby the movablecomponents of the stroller, so as to prevent inadvertent movement of thestroller components, such as inadvertent movement of a stroller towardits deployed and/or collapsed positions. The two or more discreteswitches 261, 263 are preferably spaced sufficiently apart from oneanother, or otherwise disposed relative to one another, so as to preventinadvertent actuation of one switch upon actuation of the other switch.With reference to FIG. 28, a first control switch 263 is pushed, causinga timer 265 to count up to “three” whereupon a second control switch 261is pushed by the user in order to actuate the stroller 1 folding orunfolding action.

The control switch or switches may be constructed to require that oneswitch, or a combination of switches, be engaged throughout the movementof the desired stroller components, such as during opening and/orfolding operations of strollers designed for automatic opening andclosing. Alternatively, a suitable control switch or switches, and/orsuitable controller, may be provided such that only one actuation of aswitch or switches is required to effect the desired movement of two ormore stroller components, such as full movement of a stroller betweenits fully-deployed or open and/or fully-collapsed or folded positions.As a further alternative, a controller may be provided to move thestroller to a position intermediate its fully-open and/orfully-collapsed position, such as a midway condition as shown in FIGS. 7and 8, with one actuation of a switch or switches, and further orcomplete movement of the stroller to its fully-deployed and/orfully-collapsed positions requiring a subsequent actuation of a switchor switches.

Microcontroller 255 is desirably programmed to automatically switchdirections with each successive actuation. For example, should themovement of the stroller toward the fully-collapsed position be stoppedat an intermediate point, such as upon a user noticing a toy in thestroller which is to be removed, but which has been enclosed by thepartially-collapsed stroller, the user need only release the switch orswitches and reengage them for movement in the opposite direction,toward the fully-open position. The motor may then be stopped andre-actuated for movement of the stroller to its fully-collapsedposition.

The control switch and/or controller may be mounted on the frame of thestroller, such as on the rear wheel support member or elsewhere on thestroller, or alternatively, the control switch and/or controller may beseparate from the stroller, such as on a key fob or other portabledevice, and operated using wireless technology. This may facilitate theability of a user to hold a child or baby with both hands throughout theopening and/or collapsing of the stroller.

The controller may be configured and constructed utilizing any of a widevariety of known controller designs and/or mechanisms. For instance, thecontroller may utilize electrical contact switches and/or may utilize aprocessor, microprocessor, or microcontroller. Additionally, thecontroller may operate in conjunction with one or more sensors, suchthat upon actuation, or lack of actuation, of one or more sensors themotor does not operate even when the one or more switches, or othercontrol actuation mechanism, which would normally actuate the motor, areproperly actuated.

The controller may also be provided with switches or other actuators forcontrolling additional items such as a timer, an alarm clock feature, amusic device, a monitor, a speedometer, a pedometer, or any otherdesirable items. If desired, a general auxiliary device connector 267may be provided through which various auxiliary devices may beinterchangeably connected and controlled by the controller and/orsuitable control switch, which devices may be powered by the powersource for the stroller, or through an independent power source. Forinstance, auxiliary device connector 267 may include a first port 269for connecting speakers or a portable audio player, and a second port271 for connecting a cell phone or other portable electronic device forrecharging.

Controller interface 157 also includes display 158 mounted onboardstroller 1 to provide any of a wide variety of visual or audio feedbackor ambient conditions to the user such as a battery level indicator 273,a temperature reading 275, an odometer 277, speedometer 279, clock (notshown), recharging indicator 281, the position of the stroller frame,whether the stroller will move toward its open or collapsed conditionwhen next actuated, the presence of a baby or child in the stroller 283,instructions for use and operation of the stroller, emergency telephonenumbers, environmental conditions, distance walked, average speed, orany other desired feature or parameter. Odometer 277 may be a permanentodometer providing a reading of the total distance traveled during thelifetime of stroller 1. Alternatively, controller interface 157 anddisplay 158 may be provided remotely, such as on a key fob.

Stroller 1 may also include one or more object sensors having theability to detect the presence of objects within the interior portion ofthe stroller and to interrupt and/or prevent movement of the stroller inthe direction toward its collapsed condition when the object sensordetects the presence of an object within the interior portion of thestroller. The object sensor or sensors may be of any known type, or anytype later developed, such as a mechanical weight sensor, a proximitysensor, a motion sensor, a light beam sensor, or any other device havingthe ability to detect the presence of an object within the interior ofthe stroller. The sensor or sensors may be electronic and may send asignal that is electrically acted upon to prevent or interrupt power tothe motor, and/or the sensors may be mechanical and actuate a physicallock or a brake to prevent further collapsing or the full collapsingmovement of the stroller. Sensors may also be used to detect thepresence of modular add-on devices connected to the stroller, such thatmovement of the stroller to its collapsed condition is prevented when aconnected add-on is detected, thereby preventing potential damage to theadd-on device.

Stroller 1 may also include position sensors utilized at selectivelocations on the frame to send a signal indicative of the positions ofone or more components or elements of the stroller. The position sensorscan be used for several purposes, such as sending a signal to thedisplay to provide a visual and/or audio indication to the user as tothe current position or of the deployment or the collapsing of thestroller and/or to provide an interrupting signal (or non-signal) if aposition sensor or sensors are not engaged as they would be duringproper deployment and/or collapsing of the stroller. Any one or more ofseveral known types of sensors may be utilized, such as rotary encodersat any one or more frame component pivot points, and/or limit or contactswitches which are engaged as selective elements of the stroller move totheir proper positions, or improper positions, during deployment and/orcollapsing of the stroller. By way of example, position sensors may bemounted to the stroller at positions which provide indication that thestroller has moved to its fully-deployed condition, its fully-collapsedcondition, or any condition in-between; and/or position sensors may bemounted at locations to detect the engagement or lack of engagement oflatches. Position sensors may operate in conjunction with electronictimer controls such that a signal to effect stoppage of power to themotor is sent if the position sensor is not engaged within apredetermined time period.

A resistance sensing device and/or timer may be operatively connected tothe controller to stop movement and/or move toward the unfolded or openposition when folding is interrupted, e.g. when too much resistancetoward folding movement is encountered or when the fully-closed positionis not achieved within a predetermined time. Alternatively, oradditionally, a clutch may be provided between the motor and theelements to which it is connected to provide slippage of the drivingforce of the motor if too much resistance is encountered.

A manual override may also be provided to allow manual movement of thestroller between its open and closed positions and/or manual movement ofany stroller components between their first and second positions, whichwould normally be carried out automatically by a drive mechanism. Suchmanual override may be desirable for any of a number of reasons, such asthe power source being too low to effect the desired automatic movementor the failure of any parts.

A wide variety of manual override mechanisms may be utilized inconnection with the present invention. For instance, a clutch orclutches may be provided between one or more drive mechanism elementsand their associated stroller components for use as a manual override,whereby the clutch may be moved to a position in which it effectsdisengagement of the drive mechanism. As another example, a mechanicallever or rotary element may be provided at any point in the drivemechanism and/or between the drive mechanism and one or more strollercomponents associated with the drive mechanism, which is movable betweenan automatic position (in which a drive mechanism is operatively engagedwith one or more stroller components to move the one or more strollercomponents automatically) and a manual position (in which a drivemechanism is disengaged from its operative engagement with one or morestroller components).

It will be appreciated that the above is merely by way of example, andthat a wide variety of disengaging mechanisms may be utilized with awide variety of different stroller designs, without departing from theinventive concepts of the present invention.

The movement or movements of the inventive strollers of the presentinvention can be carried out in a wide variety of ways, such astelescoping of components, sliding of components, pivoting ofcomponents, rectilinear movement of components, cam driven or guidedmovement of components, or any other known linkage which allows movementof two or more components relative to one another.

Furthermore, virtually any stroller construction which has one or morefront wheels and one or more rear wheels, or having any other wheelconfiguration such as a circular arrangement of the wheels, left andright wheels, or any other arrangement, in which the stroller has sometype of drive for moving at least one of the wheels from a firstposition to a second position may be constructed. In accordance withanother aspect of the invention, virtually any stroller construction canbe utilized which allows automatic movement of at least one of itswheels from an open position to a collapsed position, or back and forthbetween collapsed and open positions, or between an extended positionand a retracted position. In accordance with another aspect of theinvention, a stroller may be provided having a frame with one or morecomponents, which may be wheel components and/or other strollercomponents or attachments (or components to which attachments may beconnected) with a drive operatively connected with the one or morecomponents to move them from a first position to a second position. Thismay be used for automatic movement of the components between any desiredfirst and second positions. In accordance with another aspect of theinvention, one or more stroller components or attachments may be movedbetween three or more selective positions by the drive mechanism and/orcontrol switches, and/or one or more controllers.

Backup mechanical systems may be provided to serve as the drive formoving the wheels and/or other stroller components. A mechanicalsystem(s) may use elements common with the automatic system(s), useindependent element(s), or both. Stroller 1 may also be provided suchthat front and/or rear wheels move front to back and/or back to frontand/or side to side and/or top to bottom and/or bottom to top. This mayapply to other stroller components as well. For instance, a stroller maybe provided in which the wheels of the stroller remain on the ground orotherwise relatively stationary, while other stroller components moveforwardly and/or rearwardly and/or sideways and/or upwardly and/ordownwardly between collapsed and open positions.

The stroller embodiments described in detail above, are simple, robust,and extremely easy to use. The various structures of stroller 1 may allbe made of any suitable plastics, formed of metals, or constructed fromany other suitable material.

Although a collapsible stroller has been described in detail for thepurpose of illustration based on what is currently considered to be themost practical and preferred embodiments, it is to be understood thatsuch detail is solely for that purpose and that the invention is notlimited to the disclosed embodiments, but, on the contrary, is intendedto cover modifications and equivalent arrangements. For example, it isto be understood that this disclosure contemplates that, to the extentpossible, one or more features of any embodiment can be combined withone or more features of any other embodiment.

1. A braking system for a stroller comprising: a brake pedal positionednear a first rear wheel of the stroller; a braking cam operationallycoupled to the brake pedal and rotatable around a pivot point from afirst position to a second position; and a brake lever having a firstend configured to contact the braking cam when the braking cam is in thesecond position and a second end having a plurality of teeth configuredto engage at least one gear driven by the first rear wheel of thestroller when the braking cam is in the second position, wherein adepression of the brake pedal causes the braking cam to rotate aroundthe pivot point from the first position to the second position, therebycausing the teeth of the brake lever to engage the at least one gear toprevent rotation of the first rear wheel.
 2. The braking system of claim1, wherein a second depression of the brake pedal causes the braking camto rotate around the pivot point from the second position to the firstposition, thereby causing the teeth of the brake lever to disengage theat least one gear to allow rotation of the first wheel.
 3. The brakingsystem of claim 1, wherein a second rear wheel comprises a brakingdevice that is operationally coupled to the brake pedal positioned nearthe first rear wheel of the stroller.
 4. The braking system of claim 3,wherein the depression of the brake pedal causes actuation of thebraking device of the second rear wheel, thereby preventing rotation ofthe second rear wheel.
 5. The braking system of claim 3, wherein asecond depression of the brake pedal releases the braking device of thesecond rear wheel, thereby allowing rotation of the second rear wheel.6. The braking system of claim 3, wherein the braking device of thesecond rear wheel is operationally coupled to the brake pedal by acable.
 7. The braking system of claim 1, wherein the braking cam has amodified elliptical shape.
 8. A method of braking a stroller comprising:providing a braking system for a stroller comprising: a brake pedalpositioned near a first rear wheel of the stroller; a braking camoperationally coupled to the brake pedal and rotatable around a pivotpoint from a first position to a second position; and a brake leverhaving a first end configured to contact the braking cam when thebraking cam is in the second position and a second end having aplurality of teeth configured to engage at least one gear driven by thefirst rear wheel of the stroller when the braking cam is in the secondposition; and depressing the brake pedal to cause the braking cam torotate around the pivot point from the first position to the secondposition, thereby causing the teeth of the brake lever to engage the atleast one gear to prevent rotation of the first rear wheel.
 9. Themethod of claim 8, further comprising: depressing the brake pedal asecond time to cause the braking cam to rotate around the pivot pointfrom the second position to the first position, thereby causing theteeth of the brake lever to disengage the at least one gear to allowrotation of the first rear wheel.
 10. The method of claim 8, wherein thebraking system further comprises a braking device provided on a secondrear wheel and operationally coupled to the brake pedal positioned nearthe first rear wheel of the stroller.
 11. The method of claim 10,wherein the depression of the brake pedal causes actuation of thebraking device of the second rear wheel, thereby preventing rotation ofthe second rear wheel.
 12. The method of claim 10, wherein a seconddepression of the brake pedal releases the braking device of the secondrear wheel, thereby allowing rotation of the second rear wheel.
 13. Themethod of claim 10, wherein the braking device of the second rear wheelis operationally coupled to the brake pedal by a cable.
 14. The methodof claim 8, wherein the braking cam has a modified elliptical shape. 15.A braking system for a stroller comprising: a brake pedal; a braking camoperationally coupled to the brake pedal and rotatable around a pivotpoint from a first position to a second position; and a brake leverhaving a first end configured to contact the braking cam when thebraking cam is in the second position and a second end configured toprevent rotation of at least one wheel of the stroller when the brakingcam is in the second position.
 16. The braking system of claim 15,wherein a depression of the brake pedal causes the braking cam to rotatearound the pivot point from the first position to the second position,thereby causing the second end of the brake lever to prevent rotation ofthe first rear wheel.
 17. The braking system of claim 15, wherein asecond depression of the brake pedal causes the braking cam to rotatearound the pivot point from the second position to the first position,thereby causing the second end of the brake lever to allow rotation ofthe first rear wheel.
 18. The braking system of claim 15, wherein thebraking cam has a modified elliptical shape.
 19. The braking system ofclaim 15, wherein the second end of the brake lever comprises aplurality of teeth.
 20. The braking system of claim 19, wherein theplurality of teeth are configured to engage at least one gear driven bythe at least one wheel of the stroller when the braking cam is in thesecond position.